Coupling device



FIG. 1 is a perspective view of a coupling device showing our new design;

FIG. 2 is a perspective view thereof showing the design within an environment;

FIG. 3 is a top view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a front view thereof; and,

FIG. 8 is a back view thereof.

The broken line showing of a tube in FIG. 2 demonstrates the environment only and forms no part of the claimed design. 

CLAIM We claim the ornamental design for a coupling device, as shown and described. 